Origin of Renqvist surname

Origin of Renqvist surname

I'm interested in finding out the origin of my mother's surname, Renquist, or Renqvist as they spell it in Sweden. I'm guessing it's military.

My gggg-grandfather was Johannes Nilsson, son of Nils Pehrsson and Stina Johansdotter. He was born 8 Apr 1757 in Lutarp, Askeryd, Jönköping. He married Christina Pehrsdotter, born 28 Sep 1761 in Brokafall, Askeryd, Jönköping.

Their 4th child was my ggg-grandfather, Nils Johannesson Renqvist, born 12 Jul 1796 in Redeby Håkansgård, Askeryd, Jönköping; died 1 Jan 1879 in Sillvik, Askeryd. He is the first of my ancestors with the Renqvist surname. He married Anna Stina Zachrisdotter, b 14 Jun 1800, d 12 Nov 1882.

Their 4th child and eldest son was Karl August Wilhelm Renqvist, my great great grandfather (9 Jun 1835-16 Jun 1871). His wife was Anna Cathrina Johansdotter (1837-1922). She had 4 children by Karl, and 5 more by her 2nd husband, Frans August Johansson (1847-1940)

Their 3rd child was my great grandfather, Oskar Wilhelm Karlsson Renqvist (1865-1960) He immigrated to the United States in 1885. He married a Dane, Laura Maria Nielsen (1870-1931) in Jackson, Jackson, Minnesota.

Their first child was my grandfather, Arthur Leonard Renquist (1894-1961). He married Ruth Elvira Soderberg (1899-1987), daughter of two Swedish immigrants. Arthur was a veteran on World War One, as was his brother, Albert.

Arthur and Ruth's 4th child was my mother, Audrey Joan Renquist (1923-2003) She and her older brother Arthur were both WW2 veterans. She married Justin Thayer Zane (1917-1997), also a WW2 vet. My father is descended from two very historical American families, the Loomises and the Zanes.

I am their 4th and youngest son.

LOL So, now that I've listed my whole Swedish family tree on my grandfather's side, can anyone tell me how the surname Renqvist came into being?